Error while install on termux

[seisdr]

Building native extensions. This could take a while...
ERROR:  Error installing catpix:
        ERROR: Failed to build gem native extension.

    current directory: /data/data/com.termux/files/usr/lib/ruby/gems/2.5.0/gems/rmagick-2.16.0/ext/RMagick
/data/data/com.termux/files/usr/bin/ruby -r ./siteconf20190112-26739-1vvdqbd.rb extconf.rb
mkmf.rb can't find header files for ruby at /data/data/com.termux/files/usr/lib/ruby/include/ruby.h

extconf failed, exit code 1

Gem files will remain installed in /data/data/com.termux/files/usr/lib/ruby/gems/2.5.0/gems/rmagick-2.16.0 for inspection.
Results logged to /data/data/com.termux/files/usr/lib/ruby/gems/2.5.0/extensions/aarch64-linux/2.5.0/rmagick-2.16.0/gem_make.out```


also with rmagic

[jeffersonchoi]

Having the same error